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"Doctor Coban, It was with a great deal of pleasure that I first played the CD's you transferred from a reel-to-reel tape recording that I had made of a radio broadcast over 46 years ago. The results were outstanding. The quality is excellent with no sign of hiss or other tape noise after your Sound Restoration. I admit to some anxiety in ..."

Magnetic armature speaker

A speaker comprising a ferromagnetic armature actuated by magnetic attraction.